Stainless Steel Tanks - Falling Film Vacuum Evaporation Tank
The device is suitable for medicine, food, beverage, beer brewery,
chemical industry pressure, micro-pressure, water to cook, warm
dip, heat reflux, forced circulation leakage effects, aromatic oil
extraction and organic solvent recovery and other technology
with high efficiency, operation and easy.
Tank is equipped with CIP cleaning system.
SUS 304/316L Stainless Steel Material Sanitary Level
Easy installation, insulation, use a long period, can save energy
and maintenance costs corresponding.
Including evaporation chamber and condensate recovery chamber,
evaporation chamber 3000L φ1800 * 2000 * 8mm,
tube φ25 * 1.5mm,
condensate recovery chamber 1000L,
φ1100 * 1000 * 6mm,
tube φ19 * 1.0mm,
9.7 square meters,
with 1 water ring vacuum pump ,
2 stainless steel centrifugal pump,
with all connecting pipes and valves.
Capacity could be customized designed according to customers'
2 effect 3 effect Falling film evaporator is a liquid material from
the lower header on film evaporator heating chamber was added by
means of liquid distribution and film evenly distributed into each
heat transfer tube, gravity and vacuum induction and airflow, a
film from a uniform top-down flow.
Flow process, the shell is a heating medium to vaporize the liquid
and the vapor produced by the common separation chamber into the
evaporator, vapor-liquid separation after full steam into the
condenser condensate (single-effect operation) or go to the next
effect evaporator as heating medium, in order to achieve more
efficient operation, the liquid is discharged by the separation
Apparatus main body by the Ⅰ, Ⅱ, Ⅲ efficient heater, separator, hot
pumps, condensers, sterilizers, pipe insulation, feed pumps, water
pumps and instrument cabinets. Where contact with this equipment
and materials are produced with high-quality stainless steel.
Concentrated by evaporation it is widely used in water or an
organic solvent solution of medicine, food, chemical industry,
light industry, concentrated, and is widely used in wastewater
treatment over the industry.
Especially suitable for heat-sensitive materials, the equipment for
continuous operation at low temperatures under vacuum conditions,
with high evaporation capacity, energy saving, low operating costs,
and can ensure that the material invariance during evaporation.
There downstream process (and flow), countercurrent, Francis
(cross-flow), advection four forms:
The same solution and steam flow, order flow effect by a final
effect. Raw material liquid was pumped into effect, relying on the
pressure difference between the respective effect automatically
flows into the next effect complete solution since the late effect
(generally operate under negative pressure) pumped out.
Because of the pressure effect after a low boiling point of the
solution is low, after the effect of the previous solution into the
effect when a part of the water will flash produce secondary steam
is greater due to the higher concentration aftereffect before
efficiency, low operating temperature often the first effective
heat transfer coefficient is much higher than the final effect.
Downstream processes are generally suitable for treatment in the
case of high concentrations of heat-sensitive materials.
Raw materials are fed in turn by the pump from the final effect
before the effect, effect a complete liquid discharged from solid
to liquid and steam reverse flow. Generally suitable processing
viscosity changes greatly with temperature and concentration of the
solution, not easy to deal with heat-sensitive materials.
Francis (cross-flow) :
Cis countercurrent process combining both the advantages of
counterflow along avoid its shortcomings, but the complexity of the
operation, demanding automation level.
Each effect will have an addition was completed, each effect has
crystallized, the crystallization can be separated in time,
generally used for evaporation of a saturated solution.
(1) an aspect ratio L / d = 100 ~ 250;
(2) the heat transfer coefficient k = 1000 ~ 3000 kcal / (square
meters * ℃ * hour);
(3) can handle a large concentration of poor mobility of the
(4) temperature difference is small, does not affect the static
pressure of the liquid column.
Falling film evaporation process, the principle is shown below.
Required by the evaporation of material from the feed pump into the
top of a falling film evaporator, walk (tube) evaporator tube,
membrane filter cloth material through a membrane into the
distribution of heat transfer tubes, the material at the time with
gravity flow lumen being outside the tube steam heating, to
evaporate the evaporation temperature is reached, the secondary
material together with the vapor stream from the evaporator in the
form of a thin film of the inner tube.
After the secondary steam is compressed vapor compressor heating
chamber into a falling film shell as heating steam. Falling Film
heating chamber shell has a plate, guiding secondary steam,
condensate and exhaust gas can not be condensed.
In the course of the heat through the wall from the rumor itself to
the evaporation of the inner tube material, through the heat
exchanger into the secondary steam condensate water is discharged
outside the falling film evaporator.
Falling film evaporation system characteristics:
1) falling-film evaporator feed liquid is added from the top of the
evaporator, under gravity into a film along the wall fell, and in
the process of evaporation enriched at the bottom to give a
concentrate. Falling film evaporator can be evaporated to a high
concentration, high viscosity (e.g., within 0.05 ~ 0.45Ns / m2
2) Since the one-way flow of the solution is a film-type
evaporator, the heat transfer coefficient was high.
3) the residence time is short, easy to cause deterioration of
material, suitable for processing heat-sensitive materials.
Small 4) liquid hold-up, falling film evaporator can be supplied
according to the energy, changes in the degree of vacuum, the feed
amount, concentration rather take a quick operation.
5) As the process fluid flow under gravity only, rather than the
high temperature difference to drive, you can use low temperature
6) falling film evaporator is suitable for the foaming material is
concentrated by evaporation, since the liquid material into a film
evaporator in the heating tubes, which form the vapor-liquid
separation, while at the bottom of the body effect, most of the
material was pumped namely, only a small part of the feed solution
with all the secondary vapor into the separator strengthen
separation, solid-liquid whole process does not cause too much
impact, avoiding the formation of foam.